Articulating outdoor furniture

ABSTRACT

Adjustable outdoor furniture includes a fixed frame, a moveable frame attached to and moveable with respect to the fixed frame and an articulation unit separate from the fixed frame and moveable frame and releasably attachable to at least one of the fixed frame and the moveable frame. The articulation unit has a first engagement member engaging the fixed frame at one or more fixed frame locations, a second engagement member engaging the moveable frame at one or more moveable frame locations and a drive mechanism disposed between the first engagement member and the second engagement member to move the moveable frame with respect to the fixed frame.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority to U.S. Provisional PatentApplication No. 62/512,917 filed May 31, 2017, the entire contents ofwhich is incorporated herein by reference.

TECHNICAL FIELD

Embodiments of the subject matter disclosed herein relate to adjustableand articulating outdoor furniture.

BACKGROUND

Outdoor furniture is constructed for direct or indirect exposure to theelements, e.g., wind, rain, snow, sunlight, dirt and sand. Therefore,the materials used to construct outdoor furniture are selected to beresistant to damage or degradation when exposed to those elements. Thesematerials include metals, plastics, wood and wicker and are arranged asthe framing, support surfaces and cushions of the outdoor furniture. Inaddition to this framing of the outdoor furniture having a fixed frameand shape, the framing is also arranged to provide for adjustment in theposition of, for example, a foot section and a head section of theoutdoor furniture. This type of adjustable or articulating outdoorfurniture is similar to the adjustments provided by an adjustable orarticulating bed.

Adjustable or articulating beds provide selectable adjustment of thelower or foot portion and upper or head portion of a bed or a mattressdisposed on the bed from a traditional flat or horizontal position.Adjustable beds, in order to provide the desired articulation, includean adjustable bed foundation supported within a fixed bed frame. Theadjustable bed foundation includes the operational portions of theadjustable bed, which include fixed frame portions and articulatingportions that are moveably attached to the fixed frame portions.Articulating beds, however, are typically not manually operated by theoccupant but are automated or mechanized. This automation is achieved byactuators and motors provided between the fixed frame portions and thearticulating frame portions that move portions of the adjustable bedfoundation to the desired positioning.

Conventional articulating beds, however, are configured and constructedto be used indoors or in controlled environments. Adjustable beds arenot configured to be used outdoors or in environments exposed to water,moisture, dirt and sand. In addition, conventional articulating bedsrequire a source of electrical power for the motors, actuators andcontrol electronics that provide the operational functionality of theadjustable bed. This source of power is typically conventional 110/120VAC power, and the adjustable bed is plugged into an electrical outletproviding this source of power. Therefore, adjustable beds need to belocated adjacent to a suitable source of electrical power. This makesusing conventional adjustable beds in remote locations, wet locationsand locations without a source of conventional 110/120 VAC powerdifficult to impossible. Incorporating similar mechanized articulationinto outdoor furniture requires overcoming the limitations ofconventional articulating beds.

SUMMARY

Embodiments are directed to adjustable furniture or an adjustableoutdoor furnishing configured to be operated outdoors in applicationsdirectly or indirectly exposed to environmental conditions, in remotelocations that do not contain an available source of suitable electricpower or in locations where the use of 110/120 VAC power is notpreferred. In addition, articulation is provided to a variety of outdoorfurniture having different types of framing. In one embodiment, thecomponents that provide for articulation of the outdoor furniture can befixedly integrated into the framing of the outdoor furniture.Alternatively, mechanized articulation can be retrofitted onto existingoutdoor furniture and can be removed and transferred between pieces ofoutdoor furniture.

The adjustable outdoor furnishing combines a piece of outdoor furniturewith an articulation unit that in one embodiment is arranged as anarticulating furniture frame. The piece of outdoor furniture includesfixed furniture frame components, e.g., a central seating area, andmoveable frame components attached to at least one of the fixed framecomponents, e.g., adjustable foot or back sections. The articulationunit is connected between the fixed frame components and the moveableframe components.

The articulation unit includes all framing, e.g., steel structure, andelectro-mechanical components, e.g., motors, actuators, controlelectronics and power sources, to provide motorized adjustable movementbetween the fixed frame components and the moveable frame components. Inone embodiment, the electro-mechanical components include a remotecontrol and outdoor battery casing and actuator assemblies. In oneembodiment, the electro-mechanical components operate at a DC voltagesuch as 5 or 12 VDC. All electro-mechanical components are protectedagainst environmental elements such as water and moisture, i.e., arewaterproofed. In addition, the components of the articulation unit areprotected against dust, sand or other grit, corrosion and chemicalexposure, e.g., exposure to oxidants such as chlorine in a swimming poolenvironment.

In one embodiment, the articulation unit is integrated into the outdoorfurnishing as the outdoor furnishing is being manufactured. Therefore,the articulation unit is an integrated component of the adjustableoutdoor furnishing and is not removable. In addition, the articulationunit is configured specifically for a given piece, e.g., size and shape,of outdoor furniture. In another embodiment, the articulation unit is anindependent structure that is separate from the outdoor furnishing. Thearticulation unit is attached to existing or separately manufacturedoutdoor furnishings to adapt the existing outdoor furnishings intoadjustable or articulating outdoor furnishings. The articulation unit isattached to the fixed frame components and moveable frame components. Inaddition, the articulation unit can be removed from the fixed andmoveable frame.

The articulation unit can be adjusted to fit a given piece of outdoorfurniture. For example, the width of the frame and engagement members ofthe articulation unit are adjustable to the width of the components ofthe outdoor furnishing to which it is attached. Therefore, thearticulation unit is adjustable and can accommodate a plurality ofdifferent types and styles of outdoor furnishings. In one embodiment,the articulation unit includes at least one switch to provide for up anddown adjustment of the moveable furniture components. In one embodiment,the articulation unit includes two switches, each with an up and downadjustment. Each one of the switches is located on or adjacent to one ofthe arms of the outdoor furnishing.

Exemplary embodiments are directed to an adjustable outdoor furnishinghaving a fixed frame, a moveable frame attached to and moveable withrespect to the fixed frame, and an articulation unit separate from thefixed frame and moveable frame and releasably attachable to at least oneof the fixed frame and the moveable frame. In one embodiment, theadjustable outdoor furnishing is a chair. The fixed frame is a seatportion of the chair, and the moveable frame is an upper body portion ofthe chair. In one embodiment, the adjustable outdoor furnishing is alounge chair. The fixed frame is a lower body support portion of thelounge chair, and the moveable frame is an upper body portion of thelounge chair. In one embodiment t, the adjustable outdoor furnishing isa lounge chair. The fixed frame is a seat portion of the lounge chair,and the moveable frame is an upper body portion or a leg portion of thelounge chair.

In one embodiment, the articulation unit includes a first engagementmember engaging the fixed frame at one or more fixed frame locations, asecond engagement member engaging the moveable frame at one or moremoveable frame locations and a moveable or extensible member disposedbetween the first engagement member and the second engagement member tomove the moveable frame with respect to the fixed frame. Suitableextensible members include a hydraulic piston, a pneumatic piston, a gasspring, a gas lift cylinder and a locking gas lift cylinder. In oneembodiment, the extensible member is a linear actuator.

In one embodiment, the adjustable outdoor furnishing, and in particularthe moveable frame of the outdoor furnishing includes an upper bodyportion moveable frame and a leg portion moveable frame. The adjustableoutdoor furnishing includes a first articulation unit disposed betweenthe upper body moveable frame and the fixed frame and a secondarticulation unit disposed between the leg portion moveable frame andthe fixed frame.

In one embodiment, at least one of the fixed frame locations are setlocations on the fixed frame and the moveable frame locations are setlocations on the moveable frame. In one embodiment, the first engagementmember and the second engagement member are releasable members. In oneembodiment, the extensible member is pivotally attached to the firstengagement member and the second engagement member. In one embodiment,the second engagement member includes at least one roller in contactwith the moveable frame.

In one embodiment, the articulation unit also includes a cam disposedbetween the extensible member and at least one of the first engagementmember and the second engagement member. The cam translates linearmotion of the extensible member to pivoting motion between the fixedframe and the moveable frame. In one embodiment, the cam has a pivotjoint with a fixed portion attached to the first engagement member orthe fixed frame and a rotating portion attached to the fixed portion.The cam also includes a pivot arm in contact with the rotating portion,the second engagement member and the extensible member.

In one embodiment, the first engagement member includes an attachmentframe containing a plurality of fasteners to secure the attachment frameto the fixed frame at the fixed frame locations such that the attachmentframe does not move with respect to the fixed frame. In addition, thesecond engagement member contains an articulating frame rotatablyattached to the attachment frame and a plurality of rollers attached tothe articulating frame and engaging the moveable frame at one of themoveable frame locations. Each moveable frame location changes as thearticulating frame moves with respect to the attachment frame. In oneembodiment, the first engagement member has a plurality of bracketsextending from the attachment frame. Each bracket has a circular bore.The articulating frame includes a cylindrical tube passing through thecircular bore of each bracket to provide rotatable attachment of thearticulating frame to the attachment frame. In addition, thearticulation unit includes at least one arm attached to the cylindricaltube and at least one additional location on the articulating frame. Thebrackets, cylindrical tube and arm include a cam that translates linearmotion of the extensible member to pivoting motion between the fixedframe and the moveable frame.

Exemplary embodiments are also directed to an adjustable outdoorfurnishing having a fixed frame, a moveable frame attached to andmoveable with respect to the fixed frame and an articulation unitseparate from the fixed frame and moveable frame. The articulation unitincludes a first engagement member engaging the fixed frame at one ormore fixed frame locations. Each fixed frame location is a set locationon the fixed frame. A second engagement member engages the moveableframe at one or more moveable frame locations. Each moveable framelocation changes as the moveable frame moves with respect to the fixedframe. An extensible member is disposed between the first engagementmember and the second engagement member to move the moveable frame withrespect to the fixed frame.

In one embodiment, the first engagement member includes a plurality offasteners to secure the articulation unit to the fixed frame at thefixed frame locations and each fastener comprises a releasable fastener.In one embodiment, the second engagement member contains a roller incontact with the moveable frame at each moveable frame location. In oneembodiment, the articulation unit also includes a cam having a pivotjoint with a fixed portion attached to the first engagement member orthe fixed frame and a rotating portion attached to the fixed portion.The cam includes a pivot arm in contact with the rotating portion, thesecond engagement member and the extensible member. The cam translateslinear motion of the extensible member to pivoting motion between thefixed frame and the moveable frame.

Exemplary embodiments are also directed to an articulation unit forattachment to an outdoor furnishing. The articulation unit includes afirst engagement member with at least one fastener to engage framingmembers at a fixed frame location. The fastener is a releasablefastener. A second engagement member includes at least one roller toengage framing members at a moveable frame location. In addition, anextensible member is disposed between the first engagement member andthe second engagement member to move the second engagement member withrespect to the first engagement member.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of the specification, illustrate one or more embodiments and,together with the description, explain these embodiments. In thedrawings:

FIG. 1 is a schematic representation of an embodiment of an adjustableoutdoor furnishing in a flat position;

FIG. 2 is a schematic representation of an embodiment of an articulationunit;

FIG. 3 is a view through line 3-3 of FIG. 2;

FIG. 4 is a schematic representation of an embodiment of an adjustableoutdoor furnishing in an articulated position;

FIG. 5 is a schematic representation of an embodiment of an adjustableoutdoor furnishing having two articulating frames and two articulationunits;

FIG. 6 is a top perspective view of an embodiment of an adjustableoutdoor furnishing;

FIG. 7 is a bottom perspective view of the adjustable outdoorfurnishing;

FIG. 8 is an end view of the adjustable outdoor furnishing with themoveable frame in an up position;

FIG. 9 is a first side view of the adjustable outdoor furnishing;

FIG. 10 is a second side view of the adjustable outdoor furnishing;

FIG. 11 is a perspective view from the bottom of the adjustable outdoorfurnishing;

FIG. 12 is a partial view of the adjustable outdoor furnishing showingthe first engagement member of the articulation unit attached to thefixed frame;

FIG. 13 a partial view from the bottom of the adjustable outdoorfurnishing showing the first engagement member attached to the fixedframe of the adjustable outdoor furnishing; and

FIG. 14 is a partial view from the bottom of the an adjustable outdoorfurnishing showing the second engagement member of the articulation unitattached to the moveable frame.

DETAILED DESCRIPTION

The following description of the embodiments refers to the accompanyingdrawings. The same reference numbers in different drawings identify thesame or similar elements. The following detailed description does notlimit the invention. Instead, the scope of the invention is defined bythe appended claims.

Reference throughout the specification to “one embodiment” or “anembodiment” means that a particular feature, structure or characteristicdescribed in connection with an embodiment is included in at least oneembodiment of the subject matter disclosed. Thus, the appearance of thephrases “in one embodiment” or “in an embodiment” in various placesthroughout the specification is not necessarily referring to the sameembodiment. Further, the particular features, structures orcharacteristics may be combined in any suitable manner in one or moreembodiments.

Referring initially to FIG. 1, a representation of an exemplaryembodiment of an adjustable outdoor furnishing 10 showing the variouscomponents of the adjustable outdoor furnishing is illustrated. As usedherein, an outdoor furnishing refers to any type of furniture intendedfor use in an environment that is directly or indirectly exposed to theoutdoors. Therefore, these furnishings can be used, for example, onlawns, beaches, decks, pool decks, boats, roof tops, porches andscreened porches. In addition, the furnishings are adjustable in that atleast of portion of the furnishing can be moved or adjusted relative tothe other portions of the furnishing. The furnishings include foldableor collapsible furniture. Suitable adjustable outdoor furnishingsinclude, but are not limited to, chairs, lounges, benches, gliders,sofas, love seats, swings, cots, adirondack-style chairs and recliners.The furnishings are constructed from materials suitable for an outdoorenvironment including metals such as aluminum and stainless steel,plastics, wood, for example, naturally rot resistant woods and treatedwoods, and wicker.

The adjustable outdoor furnishing includes a fixed frame 11 and at leastone moveable frame 12 attached to and moveable with respect to the fixedframe. The fixed frame and moveable frame in combination constitute thefurnishing framing. The fixed frame includes the fixed support elements.These fixed support elements can include, for example, the legs 14 andside and end rails 13. The fixed support elements can also include armsand the connecting members and fasteners that secure the framing membersto each other. The fixed support elements also include the fixed supportsurface 15 that contacts a person using the adjustable outdoorfurnishing. These fixed support surfaces can be rigid and flat surfacesor flexible surfaces, for example, sling-type fabric surfaces. Inaddition, the fixed support surface can include upholstery and padding.In general, the fixed support elements include the seating and supportelements that do not move relative to each other. As illustrated in FIG.1, the fixed support elements are positioned to support the lower body.However, the fixed support elements could also include supports for thearms or portions of the upper body. In addition, the fixed supportelements can be located only in the seating area of the furnishing,e.g., not under the legs.

The moveable frame includes moveable support elements that, whiletypically being fixed or rigid with respect to each other, move, adjustor articulate with respect to the fixed frame and the fixed supportelements to provide the desired adjustment, seating position orreclining position. Any furnishing can have one or more fixed frames andone or more moveable frames. The moveable support elements include theside and end rails 16 that form the moveable frame. The moveable supportelements also include the moveable support surface 17 that contacts aperson using the adjustable outdoor furniture. Suitable moveable supportsurfaces can be rigid and flat surfaces or flexible surfaces, forexample, sling-type fabric surfaces. In addition, the moveable supportsurface can include upholstery and padding. In general, the moveablesupport elements include the support elements that move relative tosupport elements of the fixed frame. As illustrated in FIG. 1, themoveable support elements are positioned to support the upper body.However, the moveable support elements can include seat backs, headrests, foot rests, seating areas, arms rests and leg rest portions. Themoveable frame also includes back stays and other framing members thathold or secure the moveable frame in a desired position. While themoveable frame is illustrated as a structure that moves or articulatesas a single unit, the moveable frame can be segmented into a pluralityof moveable sub-frames that each can move relative to each other and thefixed frame. In one embodiment, the moveable frame attaches to the fixedframe at one or more pivot points 19.

Conventional moveable frame members in outdoor furnishings are manuallyposition or moved to a desired position, height or angle. Exemplaryembodiments provide for mechanized or mechanically assisted adjustmentof the moveable frame or moveable frames with respect to the fixed frameor fixed frames. The adjustable outdoor furnishing includes at least onearticulation unit 18. In one embodiment, each articulation unit isseparate from the fixed frame and moveable frame and is releasablyattachable to at least one of the fixed frame and the moveable frame,Preferably, each articulation unit can be attached to and removed fromthe outdoor furnishing. In general, the articulation unit is configuredto be modular or compatible with a variety of outdoor furnishings.Therefore, the articulation unit can be added or retro-fitted toexisting outdoor furnishings. In addition, the articulation unit can beremoved from a first outdoor furnishing and re-attached to a secondoutdoor furnishing.

Referring to FIG. 2, a representation of an embodiment of components ofthe articulation unit 20 is provided. The articulation unit includes afirst engagement member 22 that engages or attaches to the fixed frameor the moveable frame at one of more locations. In one embodiment, thefirst engagement member is a releasable member. Preferably, the firstengagement member utilizes any arrangement of frame members andfasteners to provide attachment to the fixed frame or moveable frame atone or more set or fixed locations. The first engagement member utilizesany suitable type of mechanism that provides for selective attachmentand removal of the articulation unit to the fixed frame or moveableframe. The first engagement member can include a fastener, for example,a threaded fastener, a clamp, a magnetic fastener and a hook and looptype fastener. A threaded fastener such as a screw can be used on framemembers constructed of wood. Referring to FIG. 3, the first engagementmember 22 is formed as a clamping mechanism having an attachment frame24 that extends at least partially around a fixed or moveable framemember 25 of the fixed frame or moveable frame and includes a threadedfastener 26. In one embodiment, the attachment frame extends at leastpartially over the top of the frame member to allow the articulationunit to hang from the frame member. Therefore, the frame member supportsthe weight of the articulation unit. As illustrated, the threadedfastener is a bolt extending through the attachment frame and contactingthe frame member to secure the first engagement member to the framemember. The attachment frame can extend around the opposite side of theframe member 25, at least partially, to provide for secure engagementbetween the attachment frame and frame member.

Returning to FIG. 2, as illustrated, the first engagement memberincludes three threaded fasteners 26 threaded into the attachment framethat engage or attach to the fixed frame or moveable frame at threedistinct locations. Therefore, in one embodiment, the first engagementmember engages the fixed frame at one or more set or fixed framelocations. Other arrangements of the attachment frame can engagemultiple frame members of the fixed frame or moveable frame. Theattachment frame of the first engagement member can include multipleframe members or frame rails and can span at least one of the length orwidth of the moveable frame or fixed frame. In general, any arrangementthat provides for secure attachment of the articulation unit to thefixed or moveable frame at the desired locations can be used.

The articulation unit also includes a second engagement member 28 thatengages the fixed frame or the moveable frame at one or more moveableframe locations. If the first engagement member engages the fixed frame,the second engagement member engages the moveable frame. Preferably, thefirst engagement member attaches to the fixed frame, and the secondengagement member engages the moveable frame member. Therefore, thearticulation unit is in contact with and spans between the fixed frameand the moveable frame and provides for assisted articulation orrelative motion between the fixed frame and the moveable frame.

In one embodiment, the second engagement member is a releasable member.While the second engagement member can be the same as or identical tothe first engagement member or can be attached to the moveable frame atone or more set locations, preferably, the second engagement member isconfigured to allow relative motion between the second engagement memberand the moveable frame as the moveable frame articulates with respect tothe fixed frame. Therefore, the second engagement member does not attachto or engage the moveable frame at a set location on the moveable frame.In one embodiment, the second engagement member engages a bottom surfaceof one or more of the framing members of the moveable frame. Therefore,the second engagement member transfers a lifting force to the moveableframe. In addition, the moveable frame can be lifted off the secondengagement member.

In one embodiment, the second engagement member is a wheel or roller incontact with the moveable frame. In one embodiment, the roller is incontact with a single framing member or rail of the moveable frame. Inanother embodiment, the roller extends across an entire width of themoveable frame. The wheel or roller rolls along the moveable frame atthe moveable frame articulates. Suitable materials for the rollerinclude plastics and elastomers.

In one embodiment, the articulation unit includes a drive mechanism 30disposed between the first engagement member and the second engagementmember. Any suitable drive mechanism that provides the desired movementbetween the first and second engagement members can be used. In oneembodiment, the drive mechanism is an extensible member. The extensiblemember moves the first engagement member relative to the secondengagement member, which moves the moveable frame with respect to thefixed frame, providing the desired articulation in the adjustableoutdoor furnishing. In one embodiment, the extensible member providesfor linear movement between a fixed portion 32 and an extensible portion34 of the extensible member in the direction indicated by arrow A.Suitable extensible members include, but are not limited to, a hydraulicpiston, a pneumatic piston, a gas spring, a gas lift cylinder or alocking gas lift cylinder. In one embodiment, the extensible member is alinear actuator, for example, a linear actuator driven by an electricmotor.

To provide for the desired relative movement between the fixed portionand the extensible portion of the extensible member, a source ofelectrical power, pressured air or pressurised fluid is provided incontact with the articulation unit and extensible member. The sources ofelectrical power, pressurised air or pressurized fluid can be integratedinto the adjustable outdoor furnishing or provided from sources externalto the outdoor furnishings. For example, control electronics and powersupplies, e.g., batteries, are provided in communication with theextensible member. In one embodiment, the power supply is a battery, forexample, a rechargeable battery. In one embodiment, the power supplyincludes a photovoltaic cell. These control electronics and powersupplies can be attached to the fixed frame or moveable frame. In oneembodiment, the control electronics are integrated into the fixedportion of the extensible member. The control electronics provide thecontrol and operational functions of the articulating furniture frame.The control electronics are configured to be suitable for an outdoorenvironment, i.e., the control electronics are waterproof or arecontained in sealed boxes. In one embodiment, the control electronicsutilized low, DC voltages. In addition, the extensible member isconfigured to be compatible with an outdoor environment. In oneembodiment, the control electronics and power supplies are containedwithin sealed control boxes. In one embodiment, the control electronicsare seated or potted in epoxy.

The control electronics can also include one or more wired or wirelessremotes to control operation of the extensible member. The controlelectronics include at least one separate remote control that providesfor the up and down motion of the moveable furniture components throughcontrol of the actuator. The remote control is configured to be suitablefor outdoor and corrosive environments, i.e., is waterproof. In oneembodiment, a switch type up-and-down button that is in communicationwith the control electronics is mounted to the articulating outdoorfurniture. The switch type button provides for adjustment of themoveable furniture components.

In one embodiment, a source of pressurized gas or pressurized fluid isintegrated into the fixed portion of the extensible member or is mountedto one of the attachment frame and the moveable frame. In oneembodiment, the articulation unit includes valves in communication withthe extensible member and one or more control levers in communicationwith the valves to direct the pressurized air or fluid to achieve thedesired motion between the fixed portion and the extensible portion.Suitable valves and levers are known and available in the art. When theextensible member is a gas lift cylinder or a locking gas lift cylinder,the articulation unit includes a locking mechanism in communication withthe extensible member and a lever in communication with the lockingmechanism to selectively engage or disengage the locking mechanism.Suitable locking mechanisms and levers for use with gas cylinders areknown and available in the art.

The extensible member is attached to the first engagement member and thesecond engagement member to provide for relative movement between theextensible member and the first engagement member and the secondengagement member. In one embodiment, the extensible member is pivotallyattached to at least one of the first engagement member and the secondengagement member. For example, the fixed portion of the extensiblemember is attached to the first engagement member at a pivot point 36.The extensible member can also be attached to the first engagementmember and the second engagement member at swivel joints.

The motion of the extensible member is linear, and the articulation unittranslates that linear motion to the desired rotational or pivotingmotion between the fixed frame and the moveable frame of the adjustableoutdoor furnishing. In one embodiment, the articulation unit includes acam 38 disposed between the extensible member and at least one of thefirst engagement member and the second engagement member. Asillustrated, the cam is disposed between the extensible portion of theextensible member and the second engagement member. The cam translateslinear motion of the extensible member to pivoting motion between thefixed frame and the moveable frame. In one embodiment, the cam includesa pivot joint 53 having a fixed portion 50 attached to either the firstengagement member or the fixed frame. As illustrated, the fixed portionof the pivot joint is mounted on the attached frame 24 of the firstengagement member. The pivot joint also includes a rotating portion 52attached to and rotatable around the fixed portion.

A pivot arm 44 extends from and is in contact with the rotating portion,the second engagement member and the extensible member. In oneembodiment, the pivot arm is pivotally connected to the extensibleportion of the extensible member at a pivot joint 46. In one embodiment,the pivot arm is formed as a generally “L” shaped arm with one end incontact with the rotating portion and the other end in contact with thesecond engagement member. In another embodiment, the pivot arm includesa first pivot arm portion 43 extending from the rotating portion and asecond pivot arm portion 42 extending from the second engagement member28. The first pivot arm contacts the second pivot arm at a pivot armjoint 48. In one embodiment, the pivot arm joint is a fixed joint thatdefines a fixed angle 40 between the first and second pivot armportions. In another embodiment, the pivot arm joint is an adjustablejoint that defines an adjustable and selectable angle 40 between thefirst and second pivot arm portions. In one embodiment, the adjustablejoint pivot arm joint is lockable at a given angle between the first andsecond pivot arm portions.

In one embodiment, the extensible member, pivot arm and pivot joint areused to adjust a location of the second engagement member in a directionas indicated by arrow B to engage a bottom of the moveable frame. Theextensible portion of the extensible member is extended or retracted,pivoting the pivot arm having a fixed angle 40 about the pivot joint 53until the second engagement member is in contact with the bottom of themoveable frame, for example, when the moveable frame is in the flat orunarticulated position. Further extension of the extensible memberpivots the pivot arm, lifting the moveable frame as the secondengagement member rolls along the bottom of the moveable frame. For anadjustable pivot joint, the extensible member is not moved, and theangle 40 is adjusted until the second engagement member contacts thebottom of the moveable frame. The angle is then locked, and extension ofthe extensible member lifts the moveable frame as the second engagementmember rolls along the bottom of the moveable frame. While illustratedas using an extensible mechanism to provide the desired movement betweenthe first and second engagement members, in general, any type of motoror drive mechanism that provides the desired relative motion between thefirst and second engagement members can be used, for example, a rotatingmotor. The extensible member is an embodiment of a drive mechanism.

Returning to FIG. 1, the adjustable outdoor furnishing 10 is a loungechair. The fixed frame 11 is a lower body support portion of the loungechair, i.e., a portion that supports from the legs to the waist or hips,and the moveable frame 12 is an upper body portion of the lounge chair.In another embodiment, the adjustable outdoor furnishing is a chair withthe fixed frame providing a seat portion of the chair and the moveableframe an upper body portion of the chair. The upper body portion of thelounge is in the flat position. The first engagement member 56 of thearticulation unit 18 is attached to the fixed frame at a single fixedengagement point 64, and the second engagement member 28 is in contactwith the bottom 58 of the moveable frame 12. The pivot point 54 of thearticulation unit is attached directly to the fixed frame at a pointseparate from the first engagement member. The pivot arm 62 extends fromthe pivot point to the second engagement member and includes a fixedangle 60.

Referring to FIG. 4, the extensible portion 66 of the extensible member18 is extended from the fixed portion 70 in the direction of arrow D.This pivots the pivot arm around the pivot point while maintaining thefixed angle 60, which moves the second engagement member along thebottom 58 of the moveable frame 12 in the direction of arrow C, pivotingthe moveable frame in the direction of arrow E with respect to the fixedframe. This achieves the desired adjustment in the outdoor furnishing.

Referring to FIG. 5, in another embodiment, the adjustable outdoorfurnishing 80 is a lounge chair having a fixed frame that is a seatportion of the lounge chair and a moveable frame that is at least one ofan upper body portion or a leg portion of the lounge chair. Asillustrated, the adjustable outdoor furnishing includes a fixed frame82, an upper body portion moveable frame 84 attached to the fixed frameat a first pivot point 83, and a leg portion moveable frame 86 attachedto the fixed frame at a second pivot point 85. In one embodiment, asingle articulation unit having a first engagement member attached tothe fixed frame and two separate second engagement members andarticulation units attached to the first engagement member andcontacting one of the upper body portion moveable frame and the legportion moveable frame is used. Alternatively, a pair of separateidentical or mirror imaged articulation units are included in theadjustable outdoor furnishing. These articulation units include a firstarticulation unit 88 disposed between the upper body moveable frame andthe fixed frame and a second articulation unit 90 disposed between theleg portion moveable frame and the fixed frame. Any suitable arrangementof articulation units disclosed herein can be used for the first andsecond articulation units.

The articulation unit disposed between a fixed frame and the moveableframe can be attached to the fixed frame so that it is located outsidethe framing of the outdoor furnishing. For example, one articulationunit can be located on and easily attached to either exterior side ofthe outdoor furnishing. In addition, one or more articulation units canbe located completely within the width of the outdoor furnishing andbelow the seating and contact surfaces of the outdoor furnishing.

Exemplary embodiments are also directed to an articulation unit asillustrated, for example, in FIG. 2, for releasable attachment to anoutdoor furnishing. The articulating unit can be attached to the outdoorfurnishing to provide assisted or mechanised articulation of moveableportions of the outdoor furnishing with respect to the fixed portions ofthe outdoor furnishing. Suitable articulation units, which are separatefrom the fixed and moveable frames of the outdoor furnishings, aredescribed herein and include a first engagement member containing atleast one fastener to engage framing members at a fixed frame location.These fasteners are releasable fasteners. A second engagement memberincludes at least one roller, or other suitable member that provides formovement along framing members, to engage framing members at a moveableframe location. A drive mechanism, which in one embodiment, is anextensible member, is disposed between the first engagement member andthe second engagement member to move each second engagement member withrespect to each first engagement member. In one embodiment, a cam isprovide between the extensible member and at least one of the firstengagement member and the second engagement member to translate thelinear motion of the extensible member into rotational motion betweenthe first engagement member and the second engagement member.

Referring now to FIGS. 6-14, an exemplary embodiment of an adjustableoutdoor furnishing 100 is illustrated. The adjustable outdoor furnishingis a sling-type outdoor lounge chair with metal framing and cloth orfabric support surfaces; however, other types of outdoor furnishings canbe used. These other types of outdoor furnishings include, but are notlimited to, chairs, cots, swings, tables, couches, love seats andadirondack-style chairs. In general, any type of furnishing used in anoutdoor, patio or pool deck environment can be used.

The adjustable outdoor furnishing includes a fixed frame 108 andmoveable frame 110 pivotally attached to the fixed frame at one or morelocations along the fixed frame. The fixed frame includes the fixedsupport elements for the furniture including, for example, legs 102,arms 106, side rails 103, ends rails 107, additional cross-rail membersand the connecting members and fasteners that connect or attached thecomponents of the fixed frame. In addition, the fixed frame includes theseating and support elements 109. The elements of the fixed frame do notmove relative to each other

The moveable frame 110 includes portions of the furnishing that move,adjust or articulate with respect to fixed frame to provide the desiredadjustment, seating position or reclining position. These portions ofthe furnishing can include, for example, seat backs, head rests, footrests, seating areas and leg rest portions. As illustrated, the moveableframe is the seat back or upper body support of the furnishing. Themoveable frame components include moveable frame side rails 113,moveable frame end rails or cross rails 115 and occupant supportelements 117 attached to the frame rails. In one embodiment, themoveable frame also includes components that move with respect to themoveable frame components, for example, adjustable back stays 111 thatengage components of the fixed frame to hold or secure moveable framemembers in a desired position. The moveable frame members can bemanually moved to a desired position, height or angle.

The adjustable outdoor furnishing includes an articulation unit 104attached to the fixed frame and engaging the moveable frame. Thearticulation unit is an independent and separate structure that isremovably attachable to the fixed frame and moveable frame, for example,by an end user of the outdoor furnishing. The articulation unit fits arange of sizes, styles and types of outdoor furnishings. Therefore, thearticulation unit contains adjustable elements and structures thatconform the articulation unit to the size and shape of the fixed frameand moveable frame of the outdoor furnishing. Attachment of thearticulation unit to the frames of the outdoor furnishing does notrequire modifications to the furnishing, for example, drilling holes inthe furnishing frames, cutting the frames or removing portions of theframes. The articulation unit can be attached to the fixed frame andmoveable frame of the outdoor furnishing with or without the use oftools.

As described herein, the articulation unit includes the structural andoperational components to provide motorized adjustment of the moveableframe relative to the fixed frame. The articulation unite includes thefirst engagement member 112 that is configured as an attachment frame.The attachment frame attaches or secures the articulation unit to thefixed frame. The attachment frame is releasably attached to the fixedframe. The attachment frame, when attached to the fixed frame does notmove relative to the fixed frame. Therefore, the attachment frameprovides a fixed or stationary frame about which the other components ofthe articulation unit can move or articulate.

Suitable materials for the attachment frame, and all other components ofthe articulation unit, include, but are not limited to, tubular metalshaving a circular or rectangular cross section, plastics, polymers,fiber glass and carbon fiber. Suitable metals include steel, stainlesssteel and aluminum. In one embodiment, the attachment frame isconstructed from materials that provide sufficient structural integritywhile reducing weight and providing resistance to corrosion. Thesematerials include, for example, aluminum, carbon fiber, fiber glass,plastics and polymers. The articulation unit when attached to the fixedframe and moveable frame is located underneath or below the supportsurfaces of the outdoor furnishing and is contained within the width andlength of the outdoor furnishing. As illustrated, the attachment frameis positioned below the seat area of the furniture.

The size of the attachment frame is variable in at least one dimensionto accommodate the existing width or length of the portion of the fixedframe to which the attachment frame is attached. Therefore, theattachment frame includes a plurality of lateral members 114 that extendalong the width of the furniture. As illustrated, the attachment frameincludes two lateral members spaced from each other. At least onelateral member has a length 116 (FIG. 13) that is adjustable toaccommodate different furniture widths and to facilitate positioning andattachment of the attachment frame on the fixed frame. In oneembodiment, at least one or both ends of each adjustable lateral memberhas a telescoping structure to adjust the length of the lateral member.As illustrated, a single end of a single lateral member includes atelescoping structure. While illustrated as a telescoping structure, anysuitable structure that provides for adjustment of the length of a framemember can be used. In one embodiment, the telescoping structureincludes a hollow tubular lateral member and an internal sliding member118 disposed within the hollow tubular lateral member. The internalsliding member is moved into and out from one end of the hollow tubularlateral member. The internal sliding member includes an elongated slot120 passing through the internal sliding member and running along aportion of the length of the internal sliding member. A set screw 122passes through the hollow tubular lateral member and the elongated slot.The set screw limits the movement of the internal sliding member intoand out of the hollow tubular lateral member and holds the internalsliding member at a selected position. Moving the internal slidingmember into and out of the hollow tubular lateral member adjusts thelength of the lateral member.

The attachment frame includes a plurality of fasteners 124 to secure theattachment frame to the fixed frame at a plurality of fixed framelocations such that the attachment frame does not move with respect tothe fixed frame. In one embodiment, each fastener is a clamping member124 attached to a given end of each one of the lateral members. For twolateral members, spaced from each other along the length of the fixedframe, the attachment frame includes four fasteners. In one embodiment,at least one of the clamping members is attached to one of the internalsliding members. As illustrated, the attachment frame includes a singlemoveable fastener 127 attached to the internal sliding member 118 of thelateral member having an adjustable length. The moveable fastener isfixedly secured to the sliding member. Therefore, moving the internalsliding member moves the clamping member. The other fasteners 124 arefixedly secured to the ends of their respective lateral members.

Each fastener or clamping member has a “C” shape to engage a bottomsurface of the internal sliding member or lateral member and the topsurface of the fixed frame member to which it is attached. Therefore,each clamping member provides for hanging attachment of the articulationunit to the fixed frame and for support of the attachment frame. Thedistal end of each clamping member, which is in contact with the fixedframe, has an “L” shape. However, each distal end can also have a “C”shape to engage the top surface of the fixed frame member and to extendat least partially along an inner surface of the fixed frame member.

Each fastener also includes a set screw 126 passing through the fastenerand engaging the fixed frame to secure or to hold the fastener to thefixed frame at a set location. In one embodiment, the set screw is athumb screw or is otherwise operable by hand. The internal slidingmember, fasteners and associated set screws are used to attach andsecure the attachment frame to the fixed frame. The set screw holdingthe internal sliding member is loosened, and the internal sliding memberis moved outward. This also moves the clamping member outward. Theattachment frame is moved into position under the fixed frame with thefasteners attached to the fixed ends of the laterals members positionedto engage the top surface of the fixed frame. A space 128 (FIGS. 13 and14) exists between the fastener attached to the internal sliding memberand the fixed frame. The fixed frame passes through this space toprovide for proper positioning of the attachment frame. The slidingmember is then moved into the hollow lateral member, moving the fastenerinward until the fastener engages the sides and top of the fixed frame.The set screw associated with the internal sliding member is tightenedfollowed by the set screws associated with the fasteners. This securesthe attachment frame to the fixed frame, preventing removal of theattachment frame and relative movement between the attachment frame andthe fixed frame. Performing these steps in reverse provides for removalof the attachment frame and therefore the articulation unit from theoutdoor furnishing.

The attachment frame also includes a plurality of cross members 130extending between and secured to the lateral members. As illustrated,the attachment frame includes three cross members. The cross membersprovide support for the lateral members and rigidity to the attachmentframe. In one embodiment, the attachment member can also includeadditional structural members such as gussets to provide additionalstrength and rigidity to the attachment frame.

The articulation unit includes the second engagement member 132 arrangedas an articulating frame disposed between the attachment frame and themoveable frame of the furnishing and rotatably attached to theattachment frame of the first engagement member. As illustrated, thearticulation unit includes a single articulating frame; however, thearticulation unit can include a plurality of articulating frames, onefor each moveable frame of the outdoor furnishing, e.g., the upper bodymoveable frame and the leg moveable frame. Each articulating frame ismoveably connected to the attachment frame.

In one embodiment, the articulating frame rotates with respect to theattachment frame and in particular with respect to one of the lateralmembers of the attachment frame. Therefore, the attachment frame of thefirst engagement member includes a plurality of brackets 134 extendingfrom one of the lateral members of the attachment frame. As illustrated,the attachment frame includes two brackets. Each bracket includes acircular bore 136. The articulating frame has a first cylindrical tube138 with a circular cross section that passes through the circular boreof each bracket to provide rotatable attachment of the articulatingframe to the attachment frame. Rotation of the first cylindrical tubewithin the circular bores allows the articulating frame to move or torotate with respect to the attachment frame. In one embodiment, abushing assembly 140 is provided where the first cylindrical tube passesthrough each circular bore. This provides smoother rotation and a betterwear surface. The first cylindrical tube is held in each circular boreand lateral movement of the first cylindrical tube along the lateralmember is prevented by a washer 142 and set pin or cotter pin 144.

The articulating frame includes a second cylindrical tube 146 with acircular cross-section. The second cylindrical tube is spaced from andconnected to the first circular tube by a plurality of spanning framemembers 154. The spanning frame members can have a set length or can beextensible members that adjust the distance between the first circulartube and the adjustable tube to accommodate the size or length of themoveable frame of the outdoor furnishing. The second cylindrical tubehas an adjustable length. In one embodiment, the second cylindrical tubehas a spanning length 147 (FIG. 14) that is adjustable to accommodate asize or width of the desired components of the moveable frame that areto be engaged by the articulating frame.

To provide for an adjustable spanning length, the adjustable tubeincludes an internal concentric extension tube 148 passing through thesecond cylindrical tube. In one embodiment a separate internalconcentric extension tube is inserted into each end of the secondcylindrical tube. Each extension tube can be selectively inserted intoand pulled from the adjustable tube. A set screw 152, knurl knob orthumb screw passes through the second cylindrical tube, for example,adjacent either end of the second cylindrical tube. Each set screwcontacts the extension tube that is inserted within a given end of thesecond cylindrical tube and secures that extension tube at a givenposition relative to the second cylindrical tube. While illustrated as acylindrical tube and cylindrical extension tube having a circularcross-section, other geometries can be used including rectangular,square, oblong and triangular.

The articulating frame includes a plurality of rollers 150 that engagethe bottom surface of the moveable frame at one of the moveable framelocations. Each moveable frame location changes as the articulatingframe moves with respect to the attachment frame, i.e., each rollermoves along or rolls along the moveable frame. As illustrated, thearticulating frame includes two rollers or rolling wheels. Each rolleris rotatably attached to an end of the second cylindrical tube and inparticular to the end of one of the extension tubes. In one embodiment,each roller is concentric with the extension tube. In one embodiment,each roller surrounds and rotates around the extension tube. Each rollerprovides the bearing surface for contacting and pushing against themoveable furniture component. Suitable materials for the roller include,but are not limited to, plastics, polymers and elastomers.

In one embodiment, the moveable frame rests on the rollers. Therefore,the moveable frame can be manually raised off the rolling wheels. In oneembodiment, each roller includes a bearing surface portion 153 having afirst diameter and an internal collar portion 151 having a seconddiameter greater than the first diameter. The moveable frame componentsrest on the bearing surface portion, and the internal collar portionengages an internal face 156 of one of the framing members of themoveable furniture component. Therefore, the second cylindrical tube isbrought into contact with the bottom of the moveable frame and theextension tubes are moved outward until the internal collar portionscontact the internal faces. This adjusts the spanning length of thesecond cylindrical tube to correspond to the spacing between themoveable frame members. In one embodiment, the adjustable tube engagesthe adjustable back stays 111 of the moveable frame to prevent thoseadjustable back stays from stopping or inhibiting movement of themoveable frame.

The articulation unit includes the drive mechanism arranged as at leastextensible member 158 disposed between the attachment frame and thearticulating frame. Any extensible member disclosed herein can be used.The extensible member is extensible and retractable to cause relativemovement between the attachment frame and articulating frame. As theadjustable furniture is used in an outdoor or otherwise corrosiveenvironment, the extensible member is preferably a sealed unit thatprotects the internal components and any electronics from water,moisture or other corrosive substances, e.g., chlorine. In oneembodiment, the electronics, and all electronics and batteries aresealed or seated in epoxy.

The extensible member is connected to the attachment frame and inparticular one of the lateral members in the attachment frame. Thelateral member to which the extensible member is attached has asufficient size and strength to support the loads applied to the lateralmember by the extensible member. In one embodiment, the extensiblemember and preferably the fixed end of the extensible member isconnected to the attachment frame with an attachment frame pivot orswivel mount 160. In one embodiment, the attachment frame swivel mountis a U-shaped frame element or bracket that is bolted or welded to theattachment frame and into which a first end of the extensible member isinserted. The extensible member is held in the U-shaped frame elementusing pins or bolts and can swivel or pivot within the U-shaped frameelement. The extensible member extends from the U-shaped frame element,and a second end of the extensible member opposite the first end, i.e.,the extensible portion, engages the articulating frame.

The articulation unit includes at least one arm 162 disposed between theextensible member and the articulating frame. In one embodiment, the armis attached to the first cylindrical tube and at least one additionallocation on the articulating frame and includes a bracket for pivotingattachment to the extensible member. The arm functions as a cam thattranslates linear motion of the extensible member to pivoting motionbetween the fixed frame and the moveable frame. In one embodiment, thearm includes a bracket 163. The second end of the extensible member ispivotally attached to the bracket. In one embodiment, the bracket isconfigured as an open frame into which the second end of the extensiblemember is inserted. An arrangement of pins and bolts are insertedthrough the two sides of the open frame and the second end of theactuator to provide the desired attachment.

Preferably, the bracket is an angled bracket having a first or push end165 and a pivot end 167 of the angled bracket opposite the push end. Theangled bracket includes an angle between the push end and the pivot end.The second end of the actuator is attached to a push end of the angledbracket. The pivot end of the angled bracket is attached to thearticulating frame and in particular the first cylindrical tube at apivot attachment point 164. In one embodiment, the pivot attachmentpoint is a fixed connection on the first cylindrical tube. Therefore,movement of the angled bracket by the actuator causes the angled bracketand the first tube to rotate about the axis of the first cylindricaltube. The first cylindrical tube rotates within the brackets. Rotationof the first cylindrical tube also rotates the other members of thearticulating frame, i.e., the spanning frame members and the adjustabletube.

In one embodiment, the arm 162 includes a secondary push member 166extending from the angled bracket to one of the spanning frame members.The secondary push member provides additional support for movement ofthe articulating frame. The secondary push member is attached, eitherfixedly or moveably, to the angled bracket at the bend along the lengthof the angled bracket. The secondary push member extends from the angledbracket to the adjustable tube or to a point along one of the spanningframe members adjacent the adjustable tube. Therefore, the components ofthe arm work in conjunction with the extensible member and thecomponents of the articulating frame to translate linear extension ofthe extensible member into rotating movement between the attachmentframe and the articulating frame. Rotating movement between theattachment frame and the articulating frame of the articulation unityields lifting movement of the moveable frame. The result is lifting orarticulation of the moveable frame as the rolling wheels progress ormove along the moveable frame component.

In one embodiment, the extensible member is a gas cylinder or a lockinggas cylinder. Alternatively, the extensible member is an actuator, e.g.,a linear actuator. The articulating furniture frame also includes thecontrol electronics and power supplies in communication with eachactuator. The control electronics provide the control and operationalfunctions of the articulating furniture frame. In one embodiment, thepower supply is a battery, for example, a rechargeable battery. In oneembodiment, the power supply includes a photovoltaic cell. The controlelectronics and power supplies are mounted to one of the attachmentframe and the moveable frame. The control electronics and power suppliesare contained within sealed control boxes. In one embodiment, thecontrol electronics are seated or potted in epoxy. The controlelectronics include at least one separate remote control that providesfor the up and down motion of the moveable furniture components throughcontrol of the actuator. The remote control is configured to be suitablefor outdoor and corrosive environments, i.e., are waterproof. In oneembodiment, a switch type of up and down button that is in communicationwith the control electronics is mounted to one or both arms of thefurniture. The switch type button provides for adjustment of themoveable furniture components.

In one embodiment, the articulation unit includes a heater mechanism,for example a heated seat cushion, that is in communication with thecontrol electronics and power supply. The heated seat cushion includesintegrated stainless steel and carbon fiber and provides for use of theadjustable furniture in cold or cooler seasons. Exemplary embodimentsare also directed to methods of making and using adjustable outdoorfurniture, methods of modifying outdoor furniture to include anarticulating furniture frame and methods for attaching an articulatingfurniture frame to outdoor furniture.

This written description uses examples of the subject matter disclosedto enable any person skilled in the art to practice the same, includingmaking and using any devices or systems and performing any incorporatedmethods. The patentable scope of the subject matter is defined by theclaims, and may include other examples that occur to those skilled inthe art. Such other examples are intended to be within the scope of theclaims.

What is claimed is:
 1. An adjustable outdoor furnishing comprising: afixed frame; a moveable frame attached to and moveable with respect tothe fixed frame; and an articulation unit separate from the fixed frameand moveable frame and releasably attachable to at least one of thefixed frame and the moveable frame, the articulation unit comprising: afirst engagement member engaging the fixed frame at one or more fixedframe locations; a second engagement member engaging the moveable frameat one or more moveable frame locations; and a drive mechanism disposedbetween the first engagement member and the second engagement member tomove the moveable frame with respect to the fixed frame.
 2. Theadjustable outdoor furnishing of claim 1, wherein: the adjustableoutdoor furnishing comprises a chair; the fixed frame comprises a seatportion of the chair; and the moveable frame comprises an upper bodyportion of the chair.
 3. The adjustable outdoor furnishing of claim 1,wherein: the adjustable outdoor furnishing comprises a lounge chair; thefixed frame comprises a lower body support portion of the lounge chair;and the moveable frame comprises an upper body portion of the loungechair.
 4. The adjustable outdoor furnishing of claim 1, wherein: theadjustable outdoor furnishing comprises a lounge chair; the fixed framecomprises a seat portion of the lounge chair; and the moveable framecomprises an upper body portion or a leg portion of the lounge chair. 5.The adjustable outdoor furnishing of claim 4, wherein the adjustableoutdoor furnishing further comprises: an upper body portion moveableframe; a leg portion moveable frame; a first articulation unit disposedbetween the upper body moveable frame and the fixed frame; and a secondarticulation unit disposed between the leg portion moveable frame andthe fixed frame.
 6. The adjustable outdoor furnishing of claim 1,wherein at least one of the fixed frame locations comprise set locationson the fixed frame and the moveable frame locations comprise setlocations on the moveable frame.
 7. The adjustable outdoor furnishing ofclaim 1, wherein the first engagement member and the second engagementmember comprise releasable members.
 8. The adjustable outdoor furnishingof claim 1, wherein the extensible member is pivotally attached to thefirst engagement member and the second engagement member.
 9. Theadjustable outdoor furnishing of claim 1, wherein the second engagementmember comprises at least one roller in contact with the moveable frame.10. The adjustable outdoor furnishing of claim 1, wherein the drivemechanism comprises an extensible member comprising a hydraulic piston,a pneumatic piston, a gas spring, a gas lift cylinder or a locking gaslift cylinder.
 11. The adjustable outdoor furnishing of claim 1, whereinthe drive mechanism comprises a linear actuator.
 12. The adjustableoutdoor furnishing of claim 1, wherein the drive mechanism comprises anextensible member and the articulation unit further comprises a camdisposed between the extensible member and at least one of the firstengagement member and the second engagement member, the cam translatinglinear motion of the extensible member to pivoting motion between thefixed frame and the moveable frame.
 13. The adjustable outdoorfurnishing of claim 12, wherein the cam comprises: a pivot jointcomprising: a fixed portion attached to the first engagement member orthe fixed frame; and a rotating portion attached to the fixed portion;and a pivot arm in contact with the rotating portion, the secondengagement member and the extensible member.
 14. The adjustable outdoorfurnishing of claim 1, wherein: the first engagement member comprises anattachment frame comprising a plurality of fasteners to secure theattachment frame to the fixed frame at the fixed frame locations suchthat the attachment frame does not move with respect to the fixed frame;and the second engagement member comprises: an articulating framerotatably attached to the attachment frame; and a plurality of rollersattached to the articulating frame and engaging the moveable frame atone of the moveable frame locations, each moveable frame locationchanging as the articulating frame moves with respect to the attachmentframe.
 15. The adjustable outdoor furnishing of claim 14, wherein: thefirst engagement member further comprises a plurality of bracketsextending from the attachment frame, each bracket comprising a circularbore; the articulating frame comprises a cylindrical tube passingthrough the circular bore of each bracket to provide rotatableattachment of the articulating frame to the attachment frame; the drivemechanism comprises an extensible member; and the articulation unitcomprises at least one arm attached to the cylindrical tube and at leastone additional location on the articulating frame, wherein the brackets,cylindrical tube and arm comprise a cam that translates linear motion ofthe extensible member to pivoting motion between the fixed frame and themoveable frame.
 16. An adjustable outdoor furnishing comprising: a fixedframe; a moveable frame attached to and moveable with respect to thefixed frame; and an articulation unit separate from the fixed frame andmoveable frame, the articulation unit comprising: a first engagementmember engaging the fixed frame at one or more fixed frame locations,each fixed frame location comprising a set location on the fixed frame;a second engagement member engaging the moveable frame at one or moremoveable frame locations, each moveable frame location changing as themoveable frame moves with respect to the fixed frame; and an extensiblemember disposed between the first engagement member and the secondengagement member to move the moveable frame with respect to the fixedframe.
 17. The adjustable outdoor furnishing of claim 16, wherein thefirst engagement member comprises a plurality of fasteners to secure thearticulation unit to the fixed frame at the fixed frame locations andeach fastener comprises a releasable fastener.
 18. The adjustableoutdoor furnishing of claim 16, wherein the second engagement membercomprises a roller in contact with the moveable frame at each moveableframe location.
 19. The adjustable outdoor furnishing of claim 16,wherein the articulation unit further comprises a cam comprising: apivot joint comprising: a fixed portion attached to the first engagementmember or the fixed frame; and a rotating portion attached to the fixedportion; and a pivot arm in contact with the rotating portion, thesecond engagement member and the extensible member. wherein the camtranslates linear motion of the extensible member to pivoting motionbetween the fixed frame and the moveable frame.
 20. An articulation unitfor attachment to an outdoor furnishing, the articulation unitcomprising: a first engagement member comprising at least one fastenerto engage framing members at a fixed frame location, the fastenercomprising a releasable fastener; a second engagement member comprisingat least one roller to engage framing members at a moveable framelocation; and a drive mechanism disposed between the first engagementmember and the second engagement member to move the second engagementmember with respect to the first engagement member.